Mortising tool



April 13 1926.

. J. H. coLLlNs MORTISING TOOL 2 Sheets-Sheet 2 Filed Jan. 5

`tatented plf 1.3i 19.26 4 'l I JOHN coLLINs, or PORTLAND, oREGoN.`

' MORTISING rooL.

. Y Applicaties Ymea Jvaiiuarys, 1925'. serial Nb. 311.

To all whomz' may concern: y l

. Be it hereby known that LJoHN H. CoL- Lms, a subject of the King of Great Britain, and a resident of Portland, in the countyof Multnomah and State 'of Oregon (whose post-olice address is 214 East- 28th` Street `i north), have invented a new and useful Mortising Tool, of which the following. is a, specification.

This invention relates generallyto car-V penters tools and particularly to av tool e for forming a mortise for door locks.f

"The object-of this invention is the production of an exceedingly simple, eiiicient,light andl inexpensive'tool .which Ycan be operated by anordinary carpentei"s brace.

A second objects to greatlydecrease the amount of time required yto form a lock mortise inV doors.' .v

, A thirdiobject is to l reducexthe' liability of spoiling a doo-r accidentally-while form- Y uw. iframe 10 on a door i5. on the mitici@ section 16 of the frame 10 is formed awslotk ying this mortise.

A fourth bject racy Vwith which vthese mortises can be formed. ff

These, and other objects, will becomeV more apparent from the speciicationfollowing as illustrated in kthe accompanying drawings, 'Y

inwhichaf Figure 1 .is la.

tached to a door. `Fig'fure 2 is avplan'rlof 'Figure'1. --Figure 3 is an enlarged section taken along theline 3 3 in Figure. 2.`V Figure 4 is a vertical section `takenfalong the .line 4`4 in Figure 2. Figure 5 is-a side eleva? tion of the clamp member with the mortis# ing attachmentremoved. Figure 6 is aside elevation of a modified form ofthis ldevice.

ofwhichFigure 7 is aliorizontal section taken along the line. 7-7 in FigureG. FigureV S'isan end elevation of Figurey 6 Aand' Figure 9 1s a transverse section taken along 1 the line A9 9 in Figure 6. e. i Y

Similar numbers of reference refer tothe same parts throughout the several views.

kReferring in 'detail to Figures 1 to inelusive,l the device consists of a` channel shaped frame lOiprovided with reinforcing vribs 11, clamping screws 12, a clampingfjawj 13 and a spacer strip 14 adapted to center 17 alongside of which are formed the guides isto increase the accu- 't- K side elevation of" the' pre?n Aerred form of this device. show ingsame ate@ formed inthe under sideofftlieshanlrffor letveen the guides 1S 'its Slflebli' .mounted 'an auger housing 19having a square central opening 20v-andan upwardly extending base 21 through which passes. a screw l22y whose square end23can slide in theslot v24 on the linner side of the 'frame 10'.'v A nut 25 on the' screw22 Vis provided withxr a handle 26v by.,

means of which `vthe 4member'19 can be clamped inany desired'position-with relationto they member 10. On the` outer end of ,the member .19; are formed the lugs27 and 128K` Onthe lug. 27 f are pivoted the. halves 2,91and V3() of a split nut, which isattacliedy `to the lug,V 27 by means .of the screw 31.

. The screw 32 in the lug 28 passes 'through spring 37 in the-lug 28 to latch the swinging ends. ofthe members 29 and 30 together* in a 'closed position, but'makes it possible V to p y easily release a screw which may be between the halves 29 and. 30 whenever desired. n

VIn the augerliousing 19 is slidablyplaced ra square .hollow chisel 38having rotatably VVplaced therein an auger '39 whoseciitting lips/40 flareout slightly past the sides of the'V chisel 38.l A shoulder. 4-1' is formed on `the auger39 and bears against a correspondring shoulder 42 on the slopingrside 43 vof the shank of the chisel .38.' 'A slot 44 .is

the escape of the chips. t

On the shankY 45. oi the augery 39 is placed :a thrust' collar and "affeed screw 47 having an enlarged,end 48fagainst which'bears a friction washer`l49. Onthethreaded end i 50 ofthe 1shankf45 is secured the internally and eXternallythreaded end 5lfo`f. they uni' versal joint 52 whose shank 53 can ybe held gby the'chuck., of an ordinary carpenters brace.

on the threadedend'si is Siidaioiykeyedk the collarf54 byfmeansof a key 55. A knurled nut 56 is placed .on the threaded portion of the end 51 and is adapted to. force' the member 54 against the 1nenibers49 and ...iTheoperation.ofV this, portion .oit the deviceis .as lfollows; lThe maclianic attaches the y'frame' 10 toft-herdoor 15 intliecorrect positionl for the mort-iscl having tlieauger lin either theupperor lowervrpositionas i 110.

seems most convenient. Rotation of the shank 53b'y means of a manually operated brace or. by @power 'drveridevea @euses .Y

ico y the auger 39 to feed itself into the door in a plane parallel to the door itself, its lateral position, of course, having` been determined by placing a spacer strip 14 of the correct thickness under the clamp.

As the round auger 39 works its way into the. door, the square hollow chisel 38 is forced in behind same by means of the screw 47 which is frictionally driven through the washer 49 under the control of the nut 56, the adjustment of which may be varied to suit the particular kind of a door 'being o perated upon. Then the desired depth is reached the halves 29 and 30 of the screw holding nut are permitted to separate, and the square auger with its round auger may be pulled out bodily from the hole just formed. The screw 22 is now released and the auger containing housing is moved to the next position, when the nut is again perr mitted to close and the operation repeated,

7 strip 63.

and so on until the desired length of mortise is attained.

Turning now to the modification shown in Figures 6 to 9 it will be obs-erved that the same device is herein illustrated, except that the feed screw is back geared and theV vertical and lateral adjustments of the relation between the door and the boring attachment are secured on dove tailed slides. This modification will be briefly described as follows: On the door is placed a channel Vshaped frame 61 provided on one side with clamping screws 62 which bear against the clamping On the upper and lower ends of themember 61 are formed the dove tailed guides 64, between which is slidably placed a plate 65'having its sides 66 dove tailed. Acro-ss the sides 66 is pla-ced a base 67 adapted to slide on the member 65. A gib 68 and clamping screws 69 are adapted to fix the lateral relation of the members 61 and 65. Clamping` screws 70 fix the relation between the members 65 and 67.

On the base 67 are mounted the twoguide rods 71 across whose shouldered outer ends .7 2 is placed a circular plate 73. Feed screws 74 are rotatably mounted between the base 67 and the plate 73 and are provided on their projecting ends 75 with the gears7 6 which mesh witha pinion-7 7 on the hollow shaft 78 on whose outer end 79 is pinned a universal joint 80. t collar 81A is securedon the shaft 78 against the member 73.

The hollow square chisel 81 is provided with a round shank 82 which is mounted in the chuck 83. Across the screws 74 are placed a pair of rotatable disks 84 provided with slots 85 which receive the guide rods 71, andthe slots 86 which receive the feed screws 74.' The ends 87 of the slots 86 are threaded yso that they will engage the feed screws 74 if turned in one direction and release themif` turned in the opposite direc- 4tion. Theldisks 84 are provided vvwith a recess H in their center to receive the shoulder 88 of the auger 89 whose splined end 90 is slidably carried by the shaft 78. Spacers 91 are 'placed between the chuck 83 and the disks 84, and united thereto by means of the screws 92. A latch 93 on one of the disks 84 is adapted to hold the disks 84 in their screw engaging relation when the notches 94 are in register. This same result, of course, could be accomplished in many other ways.

IThe operation of this modification of the device is asfollows: The frame 61 is clamped on the door 60 and the member 65 is moved laterally until the chisel 81 is central with the door 60 and then clamped by means of the screws 69. The base 67 is then moved vertically to the starting point and clamped by means of the screws 70, after which rota tion is applied to the shank 95 by means of a carpenters brace, an electric motor or other convenient source of power, which causes the auger 89 to rotate and to feed itself into the door. At the same time the screws 74 are made to revolve thereby causing the disks 84 to advance along the screws 74 and force the chuck 83 with its auger 81 to follow the auger 89 into the door to the desired depth. The chips come out of the side opening 96 in the chisel 81 or out 'of the end 97 of the shank 82 between the chuck 83 and the nearest disk 84.

I/Vhile this construction is somewhat more complicated than the one previously described it possesses the advantage of having a finerl feed onthe square'auger without the employment of an extremely fine feed screw, and also that there is at no time lan unsupported screw projecting from the device, as is the case in the yfirst mentioned form.

iii-There extreme cheapness vis desired it is preferable to eliminate the slide between the members 10 and 19 in the first form'jdescribed, and to combine these two elements and utilize the door itself as a guide -upon which the frame 10 can slide, which may' very readily be done since the exterior of the doo-r being operated upon is sufficiently accurate as a base line from which to construct the mortise desired.

I am aware that various forms of mortising machines have been constructed in the past but all of those with which I am f(- miliar are either too heavy to be carried around by the mechanic with his kit of tools or are too expensiveto be employed by the average workman, I therefore have directed by claims towards a special form of tool which can be operated either manually or by power having only those elements which are absolutely necessary for the production of a perfect mortise, namely the square auger itself and means for feeding -this auger accurately into a door.

I claim: v-1. A m ort-ising tool h a'vii'rg' in combiiiation,

vin

a U shaped'olamp adapted to be attached to a door; a slide mounted on said Clamp having a hollow square guide formed thereon; a hollow square chisel in saidv guide; Said clamp having a slot formedtherein permitting said chisel to pass therethrough; an auger in said chisel; a head on said auger and driving connections between said head and chisel adapted to advanoe'said chisel.

2. A mortsing tool having in combination a U shaped `Clamp adapted to be secured to the edge of a door over the location for a mortse, said clamp having its side over the door-edge slotted; a slide mounted Lover said slot; a slide holding` clamp between said door clamp and said slide; a hollow square guide projecting from said slide; a split nut on the end of said guide; a screw n said nut; a hollow chisel in said square guide proj eotng through said clamp and rotatably attachedv to said screw; an auger n said chisel eX- tendmg through sald screwy'a fr1ot1on feedl between sald-sorew and auger and a shank on said friction feed adapted to recevethe chuck of a carpenters brace. g

JOHN H. COLLINS. 

